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Copper

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Copper Age
Society, culture, cultures, civilization and civilizations Archeology Copper
Copper as an antimicrobial agent
Antimicrobial agents Copper
Scientists have created a new recyclable metal foam only 10 times heavier than air that can filter out tiny particulates, including droplets and aerosols containing the coronavirus, exhibiting near 100% filtration efficiency, and is just as breathable as filters in current N95 masks : science
https://www.reddit.com/r/science/comments/mc74j1/scientists_have_created_a_new_recyclable_metal/
Copper
New catalyst efficiently turns carbon dioxide into useful fuels and chemicals | Brown University
https://www.brown.edu/news/2020-08-12/c2-plus
Copper Climate change and carbon